#! python3
# -*- coding: utf-8 -*-


class MinStack:
    def __init__(self):
        """
        initialize your data structure here
        """
        self.stack = []
        self.min_stack = []

    def push(self, x):
        """
        :type x: int
        :rtype: void
        """
        self.stack.append(x)
        if not self.min_stack:
            self.min_stack.append(x)
        else:
            if x < self.min_stack[-1]:
                self.min_stack.append(x)
            else:
                self.min_stack.append(self.min_stack[-1])

    def pop(self):
        """
        :rtype: void
        """
        self.stack.pop(-1)
        self.min_stack.pop(-1)

    def top(self):
        """
        :rtype: int
        """
        return self.stack[-1]

    def getMin(self):
        """
        :rtype: int
        """
        return self.min_stack[-1]




# Your MinStack object will be instantiated and called as such:
# obj = MinStack()
# obj.push(x)
# obj.pop()
# param_3 = obj.top()
# param_4 = obj.getMin()

if __name__ == '__main__':
    minStack = MinStack()
    minStack.push(-2)
    minStack.push(0)
    minStack.push(-3)
    minStack.getMin()
    minStack.pop()
    minStack.top()
    minStack.getMin()
    print(minStack.stack)